[SOLVED] Linux hung_task_timeout_sec | Password prompt take so long to appear

[SOLVED] Linux hung_task_timeout_sec | Password prompt take so long to appear :

"hung_task_timeout_sec"
"Password prompt take so long to appear"
"login timed out after 60 seconds"
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

This "hung_task" error due to changes made in server like "DB, APP or Antivirus software"
Se we have to identify what changes done before showing error.

[SOLVED] Linux hung_task_timeout_sec | Password prompt take so long to appear:

1- Boot the system from installation boot CD-ROM / mounted ISO image
2- Enter to OS using maintenance mode
3- Give root password at "give root password for maintenance or press ctrl+d to continue"

Step 1:

# echo 0 > /proc/sys/kernel/hung_task_timeout_secs
# sysctl -p
or
#vi /etc/sysctl.conf

add below two lines

vm.dirty_background_ratio = 5
vm.dirty_ratio = 10

# init 6

Enter user name and it will ask for password.

Step 2:
ERROR:"login timed out after 60 secondes"
Here we have to identify which server making my server busy and disable that service.

For RHEL 6

#chkconfig --list
or
#chkconfig --list | grep $(runlevel | awk '{print $2}'):on
#chkconfig <service name> off

For RHEl 7

#systemctl list-units --type service

#systemctl list-units --type service --all

# systemctl is active <Service Name>

# systemctl disable <Service Name>

# init 6

Done - Server will boot normally